AT HEBREW BOOKS: THE BOOK OF PSALMS IN JUDEO-ARABIC. Judeo-Arabic is Arabic written in Hebrew letters. This 1898 edition of the Book of Psalms in a Judeo-Arabic translation can be downloaded for free at the link. It gives no information on where the translation comes from, and I doubt that many scientific text-critical and philological principles were at work in the production of the edition, but it gives you the Psalms in Judeo-Arabic. For readers looking for a familiar text to read, as one does, for brushing up on or improving their Judeo-Arabic, this looks like a useful resource.
More on Judeo-Arabic here and here.